/Engine/Plugins/Runtime/nDisplay/Source/DisplayCluster/Public/Render/PostProcess/IDisplayClusterPostProcess.h
PP operation on a view region before warp&blend (if available for the current projection policy) the corresponded function will be called once per viewport
virtual void PerformPostProcessViewBeforeWarpBlend_RenderThread ( [FRHICommandListImmediate](API\Runtime\RHI\FRHICommandListImmediate) & RHICmdList, const [IDisplayClusterViewportProxy](API\Plugins\DisplayCluster\Render\Viewport\IDisplayClusterViewportProxy) * ViewportProxy ) const